<template>
  <div style="margin: 20px 20px">
    <el-tree
      ref="tree"
      :data="data"
      :props="defaultProps"
      show-checkbox
      default-expand-all
      node-key="id"
      highlight-current/>
    <el-button :disabled="saveBtnDisabled" type="primary" @click="save">保存</el-button>
  </div>
</template>
<script>
import menu from '@/api/acl/menu'

export default {
  data() {
    return {
      saveBtnDisabled: false,
      data: [],
      defaultProps: {
        children: 'children',
        label: 'name'
      },
      roleId: ''

    };
  },
  // 监听器
  watch: {
    $route(to, from) {
      console.log('路由变化......')
      console.log(to)
      console.log(from)
      this.init()
    }
  },

  created() {
    this.init()
  },
  methods: {

    init() {
      if (this.$route.params && this.$route.params.id) {
          this.roleId = this.$route.params.id
          this.fetchDataById(this.roleId)
      }
    },
    fetchDataById(roleId) {
        menu.toAssign(roleId).then(response => {
            this.data = response.data.children
            var jsonList = JSON.parse(JSON.stringify(this.data))
            debugger;
            var list = []
            this.getJsonToList(list, jsonList[0]['children'])
            console.log('最终集合')
            console.log(list)
            this.setCheckedKeys(list)
        })
    },
    // 把json数据转成string再转成对象，根据Key获取value数据
    getJsonToList(list, jsonList) {
        // 遍历这个集合对象，获取key的值
        for (var i = 0; i < jsonList.length; i++) {
            if (jsonList[i]['select'] && jsonList[i]['level'] === 4) {
                list.push(jsonList[i]['id'])
            }
            if (jsonList[i]['children'] != null) {
              this.getJsonToList(list, jsonList[i]['children'])
            }
        }
    },

    getCheckedNodes() {
      console.log(this.$refs.tree.getCheckedNodes());
    },
    getCheckedKeys() {
      console.log(this.$refs.tree.getCheckedKeys());
    },

    setCheckedKeys(list) {
      this.$refs.tree.setCheckedKeys(list);
    },

    save() {
      this.saveBtnDisabled = true
      var ids = this.$refs.tree.getCheckedKeys().join(',');
      // vue elementUI tree树形控件获取父节点ID的实例
      // node_modules\element-ui\lib\element-ui.common.js
      // 25348行修改源码
      menu.doAssign(this.roleId, ids).then(response => {
          if (response.success) {
              this.$message({
                type: 'success',
                message: '保存成功'
              })
              this.$router.push({ path: '/acl/role/list' })
            }
      })
    }
  }
};
</script>
